Commodity2005200620072008200920102011
Silica sands & quartz sands, whether or not coloured $88 $24 $3,053 
Natural sands other than silica & quartz, whether or not coloured, other th ...$30$4$892$86,572$54,328$58$92
Total$30$92$892$86,596$54,328$3,111$92